Stability was never an issue in either XP or Vista and the card was able to play for hours on end without screen errors, image decay or unwarranted system restarts. The card actual performance caliber is right around that of ATI's X1950 Pro the other team's solution in the $200.00 price range market. The card already comes very overclocked so getting results too much beyond XFX specs will require some better cooling and a voltage mod, but after reading many people's reviews the card does seem to have the potential to be a very overclocker friendly product.